Synthesis of heteroatom-doped nanoporous carbons using zeolite template and their electrochemical application = 제올라이트 주형을 이용한 헤테로원자 도핑 나노다공성 탄소의 합성 및 전기화학적 응용성 연구

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Recently, heteroatom-doped nanoporous carbons have attracted a great deal of attention in the research field of electrochemical applications. However, a more rigorous research is still needed to determine the reaction mechanism and active sites involved with the heteroatom-doped carbons. The synthesis of heteroatom-doped carbons often requires high carbonization temperature, making the control over dopant bonding configurations and the structure of the carbon difficult. As a result, designing a reasonable model to identify the individual effect of different dopant species has been challenging. In this thesis, N-doped carbons having a high content of N with various distributions of N species and an identical 3D graphene-like microporous structure were synthesized using zeolite as a template. Using $Ca^{2+}$ ion catalysts embedded inside the zeolite framework, the carbonization temperature could be lowered down to $500^\circ C$, and the modulation of the N species substituted in the carbon could be achieved by changing the carbonization temperature. These N-doped carbons were used to investigate the efficiency of each N species on the oxygen reduction reaction, without the influences from the porous structure of the carbons. The results indicate that the graphitic N was more effective in enhancing the oxygen-reduction performance of the 3D microporous carbons than pyridinic N.
Advisors
Ryoo, Ryongresearcher유룡researcher
Description
한국과학기술원 :화학과,
Publisher
한국과학기술원
Issue Date
2020
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 화학과, 2020.8,[vi, 93 p. :]

Keywords

Porous carbon▼aHeteroatom-doping▼aN-doping▼aZeolite-templated carbon▼aOxygen reduction reaction; 다공성 탄소▼a헤테로원자 도핑▼a질소 도핑▼a제올라이트 주형 탄소▼a산소 환원 반응

URI
http://hdl.handle.net/10203/284388
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=924433&flag=dissertation
Appears in Collection
CH-Theses_Ph.D.(박사논문)
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